0887bd6a7d
* integration/bash (__eat_prompt_command): Remove extra '\'s. * integration/bash (__eat_in_prompt_command): New variable. * integration/bash (__eat_preexec, __eat_before_prompt_command) (__eat_after_prompt_command, __eat_before_exec): New function. * integration/bash: Modify PS1 to update terminal title when displaying prompt. Add '__eat_before_exec' as 'DEBUG' trap handler to update terminal title just before executing a command. Prepend and append '__eat_before_prompt_command' and '__eat_after_prompt_command' to 'PROMPT_COMMAND' to avoid getting trapped in 'DEBUG' trap.
80 lines
2.5 KiB
Text
80 lines
2.5 KiB
Text
# integration/bash --- Bash integration
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# Copyright (C) 2022 Akib Azmain Turja.
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# This file is not part of GNU Emacs.
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# This file is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# For a full copy of the GNU General Public License
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# see <https://www.gnu.org/licenses/>.
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__eat_prompt_command () {
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# Send the current working directory, for directory tracking.
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printf '\e]7;file://%s%s\e\\' "$HOSTNAME" "$PWD"
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}
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__eat_preexec () {
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# "${PWD/$HOME/'~'}" converts "/home/akib/org/" to "~/org/".
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# The next one is substituted with '$', or '#' if we're "root".
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printf '\e]2;%s@%s:%s%s %s\e\\' "$USER" "$HOSTNAME" \
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"${PWD/$HOME/'~'}" \
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"$(test $UID -eq 0 && echo '#' || echo '$')" "$BASH_COMMAND"
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}
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__eat_in_prompt_command=no
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__eat_before_prompt_command ()
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{
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__eat_in_prompt_command=yes
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}
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__eat_after_prompt_command ()
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{
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__eat_in_prompt_command=no
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}
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__eat_before_exec () {
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if test $__eat_in_prompt_command = no \
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&& test "$BASH_COMMAND" != __eat_before_prompt_command
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then
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__eat_preexec
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fi
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}
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# Add '__eat_prompt_command' as the last element of 'PROMPT_COMMAND'.
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if test -z "$__eat_bash_integration_enabled"
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then
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__eat_bash_integration_enabled=yes
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PS1='\[\e]2;\u@\h:\w$\e\\\]'"$PS1"
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PROMPT_COMMAND+=(__eat_prompt_command)
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trap '__eat_before_exec' DEBUG
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# Wrap 'PROMPT_COMMAND' to avoid it getting trapped in 'DEBUG' trap.
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# Step 1: Append to PROMPT_COMMAND.
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PROMPT_COMMAND+=(__eat_after_prompt_command)
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# Step 2: Prepend to PROMPT_COMMAND.
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# Step 2.1: Move all elements to make the first index free.
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# Fun fact: Microsoft doesn't still know this simple trick. They
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# use something as silly and pityful as 'VAR=$PROMPT_COMMAND' to
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# copy a Bash array in VSCode Bash integration script, that simply
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# won't work ever, and then complain about Bash in the comments!
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# LOL. ;D
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for i in $(eval "printf {${#PROMPT_COMMAND[*]}..1..-1}")
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do
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PROMPT_COMMAND[$i]=${PROMPT_COMMAND[$((i-1))]}
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done
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# Step 2.2: Assign the first element.
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PROMPT_COMMAND[0]=__eat_before_prompt_command
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fi
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# Local Variables:
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# mode: sh
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# End:
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